Diff bolt circle diameter

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07-15-2015 | 01:04 PM

WestfieldMX5

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Diff bolt circle diameter

Anybody who knows the diamater of the bolt circle on a 1.8 diff? (The red circle)
Surely someone has an open case lying around and wouldn't mind measuring

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07-16-2015 | 07:37 PM

WestfieldMX5

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anyone, anyone, Bueller?

07-16-2015 | 08:00 PM

rleete

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Engineer's answer: exactly double the radius.

*sorry, I couldn't resist*

07-17-2015 | 09:28 AM

WestfieldMX5

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mmm, now if you could tell me the radius, I'd be happy too. Heck, for all I care, you tell me the circumference.

07-17-2015 | 10:26 AM

gjsmith66

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Looks like 8 inches exact...

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07-17-2015 | 10:40 AM

gjsmith66

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Using a more accurate instrument, it is actually closer to 7 and 15/16 inches.

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07-17-2015 | 04:18 PM

Savington

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$10 says it's called out as 200mm center-center.

07-17-2015 | 09:10 PM

gjsmith66

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07-18-2015 | 07:35 PM

WestfieldMX5

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Thanks a bunch Gary!! really helpful. By measuring the distance between 2 bolts (77mm) I calculated the diameter to be 201.2mm
I figured it was probably 200mm since Jap stuff is metric, which means that the distance between 2 bolts is really 76.5mm, not 77mm

Last edited by WestfieldMX5; 07-18-2015 at 08:29 PM.